C Program to find sum of given series by using Function

#include
#include
long int sum_sqr(int);
main()
{
 int n;
 clrscr();
 printf("\n Enter any number : ");
 scanf("%d",&n);
 printf("\n Sum of Series is %ld",sum_sqr(n));
 printf("\n\n Press any key to exit. . .");
 getch();
}

long int sum_sqr(int m)
{
 if(m<=1)    
return 1;   
else    
return 
(m*m+sum_sqr(m-1));   
}